Not quite finished reading this yet. It's good, but you've got to be aware you need a science dictionary to hand. The professor brings many salient points to mind. He gives his view that we live in the 'Aluminium age', even though there is more of the metal in the world, it has never been as easy to poison yourself with the metal. Before the 19 century, if I remember, the metal was 'tied up' meaning Biologically un-reactive in the body. When it was processed from the ore, bauxite, it becomes available to react with our body and since it's always been unavailable to the body it never had to deal with it, but not now. That's how I read it.